When can kids shower by themselves?

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

1. 1
   Supervising from outside the bathroom and calling out reminders to wash specific body parts
2. 2
   Doing 'sniff checks' after the shower and sending the child back if they still smell
3. 3
   Checking the child's hair for soap residue and having them re-rinse if needed
4. 4
   Asking children from time to time if they still enjoy it
5. 5
   Waiting for children to express a desire to bathe or shower alone
6. 6
   Stopping group baths when kids become uncomfortable or when behavior gets out of hand

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.